The Shiro Shiro no Mi gave Capone Bege (One Piece) the power to become a human fortress.

Power/Ability to:

Contents

Capabilities

User with this ability either is or can transform into an fortress, fortified structure with ability to store/create people, weapons, vehicles, and defenses from inside their body and release them at full size. User may appear physically as a fortress, become one when they use their powers or keep their normal form constantly.

On the most basic level, users internal anatomy remarkably spacious and capable of having other beings/creatures/technology/structures stay/exist inside them for extended time while supplying their visitors with habitable environment.

On the more advanced level user can create/summon beings/creatures/technology/structures inside them and deploy them as needed. If user is of relatively human size, their troops will transform into full-sized form after exiting their host.

TCG

Video Games

Gallery

Buster Baron (Buso Renkin) is a gigantic armored robot that serves as a moving fortress, and can replicate up to six Buso Renkin within its interior.

DJ Octavio's (Splatoon) Octobot King behaves like a flying fortress, being able to deploy Octarian troops and possessing an arsenal of octorpedoes, rocket fists, the Octarian equivalent of the Killer Wail...

...octomissiles...

...and an impenetrable force-field.

Castle of Dark Illusions (Yu-Gi-Oh!) is a floating fortress that casts a blanket of darkness, and in combination with the Chaos Shield, a near-unbreakable barrier.